Qin Ruyin traveled through time and became the sixth girl of the Qin family in Daying Dynasty. She was forced to change her marriage as soon as she opened her eyes. Her cousin robbed her of her good marriage to the Wang family and gave her a widower, Jiang Jiuxiao, the Minister of Civil Service. When the two met for the first time, they reached a deal - she would keep him house to avoid trouble, and he would be the knife in her hand. It was purely an alliance of interests, each getting what he needed. Qin Ruyin originally wanted to lie down but was forced to fight in the house. She was entrusted by her original body to protect her family. She was brave, smart, fair and compassionate. He began to pay attention to her, and the closer he got, the more he was attracted to her. In the days that followed, the two worked together to solve the crisis that had destroyed the Qin and Jiang families in the previous life, and worked together to defend their home and country, in exchange for He Qing Haiyan, who became each other's salvation.